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Finding the Fourth Proportional to 39,889.26, 55,047.56 and 21,984.92

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Solution

The fourth proportional to 39,889.26, 55,047.56 and 21,984.92 is: 30,339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,889.26 : 55,047.56 = 21,984.92 : x
  2. Step 2: Convert to fraction form
    39,889.26/55,047.56 = 21,984.92/x
  3. Step 3: Cross multiply
    39,889.26x = 55,047.56 × 21,984.92
  4. Step 4: Simplify right side
    39,889.26x = 1,210,216,202.80
  5. Step 5: Solve for x
    x = 1,210,216,202.80/39,889.26
  6. Step 6: Final answer
    x = 30,339.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.